Bethesda-Chevy Chase junior Mark Karver enjoyed a good 1984-85 basketball season but didn't make anyone's all-America list. Spingarn's Howard Tinker spent most of his junior year on the bench, cheering on his teammates in their 31-0 championship season.

So, both players are eager to do well tonight when they play with Team D.C. against a 19-and-under team from the People's Republic of China at George Washington University's Smith Center at 8 p.m.

This will be the sixth game in a nine-game, 16-day visit to this country for the Chinese team. The visitors have won only two games, but have been impressive throughout. Leading the Chinese team are 7-foot-3, 235-pound Wei Quanjia and 6-3 guards Wang Fei (25-points average) and Cai Guangsheng (18).

Neither the 6-2 Tinker nor 6-7 Karver will start tonight, but both will play in what is expected to be a quick-paced, high-scoring game. The game will be played using international rules, which require a 30-second clock.

"I think we have a pretty talented team," Team D.C. Coach Stan Anderson said. "With that clock and their height, we have to concentrate on getting the ball up court quick and shooting" . . .